Process of making plastic lubricating compounds.



- ELI 1 BURCH, OF LAUREL SPRINGS, NEW JERSEY, ASSIGNOR TO CREW LEVIGK COM- PANY, A CORPORATION OF PENNSYLVANIA.

. PROCESS OF MAKING PLASTIC LUBRICATING COMPOUNDS.

rescuer.

No Drawing.

To all whom it may concern;

Be it known that I, ELI F. BURCH, a citizen of the United States, residing at Laurel Springs, in the county of Camden and State of New Jersey, have invented certain new and useful Improvements in Processes of Making Plastic Lubricating Compounds, of which the following is a full, clear, and exact specification.

This invention relates to a process of making lubricating compounds, and its object is to produce a lubricating compound which shall be' insoluble in water, possess great afiinity for metallic surfaces, be of thick or semi-solid consistency, plastic and very unctuous, and shall also be stable and maintain its consistency over a wide range of temperature.

Prior to my process, so far as I am aware, it has not been practicable to produce a semi-solid lubricating compound composed largely of asphaltic oils because of the tendency of the oil to become stringy, or to coagulate, as the result of the thickening process, and also because of the lack of plasticity in the thickened oil.

In carrying out my invention, I take, as an example, approximately of an asphaltic oil, such as heavy engine oil or black oil or other benzene soluble asphaltic oil; and approximately 40% of a petroleum oil of the paraflin series, such as an oil comprising mainly or largely dodecane. These oils are mixed in a still at a temperature of approximately 200 F., in order to secure a thorough mixture. The mixture is then agitated by blowing air therethrough by any suitable means, such as a perforated pipe,

and at the same time the temperature 1s raised to approximately 400 F. to 450 F. and maintained at such temperature during the necessary blowing operation. During the blowing operation, a considerable quantity of water, increasing with increase in heat, will pass over as distillate, but such oil distillate as may simultaneously occur will be negligible. As the blowing is continued, the mixture will be reduced to thicker consistency, and finally to a semifluid or grease consistency; for example, about as thick as hard Vaseline.

The resultant product possesse s a high de gree of plasticity without stringmess or coagulation, and by reason thereol, as well as because of its lubricating characteristics Specification of Letters Patent.

Patented Aug. 2%, tum.

Application filed June 16, 1916. Serial No. 103,929. g

useful as a lubricant for the bearing surfaces of hydraulic machinery, or other parts which are often submerged or subjected to the action of flowing water.

Having thus described my invention, I declare that what I claim as new and desire to secure by Letters Patent is 1. The process of preparing a lubricant,

which consists in mixing an asphaltic oil and a parafiin oil, the latter having approximately thephysical properties of dodecane, then heating the mixture to a temperature of approximately 400 F. to 450 F. and blowing air through the heated mixture.

and its insolubility in water, it is especially 2. The process of preparing a lubricant which consists in mixing an asphaltic oil and a parafiin oil having approximately the physical properties of dodecane, then heating the mixture to a temperature of approximately 400 F. to450 F. and agitating the same in the presence of air.

3. The process of preparing a lubricant which consists in mixing an asphaltic oil and a paraffin oil, the latter having approximately the physical properties of dodecane, then heating the mixture to a thickening temperature, and simultaneously agitating the same in the presence of air.

4. The process of treating a liquid lubricant of mixed asphaltic oil and parafin oil to make it suitable for use in'contact with distilling ofl water and reducing it to a thick plastic mass of homogeneous and stable character. 1

7. The process of preparing a lubricant which consists in mixing asphaltlc 011 and parafin oil, heating moderately to facilitate their thorough mixture, then heating to a higher temperature nd blowing air through the mixture, the proportion of the ingredicuts and the temperatures and the duration of the last mentioned stageof treatment be ing such as to give a resulting lubricant of thick plastic consistency, insoluble in Water, possessing great aifinity for metallic surfaces, stable, and homogeneous.

8. The process of preparing a lubricant which consists in mixing asphaltic oil and parafiin oil, heating the mixture, and bloW- ing air therethrough, the proportion of the ingredients and the temperatures and the duration of the last mentioned stage of treatment being such as to give a resulting lubricant of thick plastic consistency insoluble in Water, possessing great aflinity for metallic surfaces, stable, and homogeneous.

In testimony whereof I aifix my signature, in presence of two Witnesses.

ELI F. BUR-OH.

Witnesses:

WILLIAM F. PALMER, C. V. EDWARDS. 

